Nps-Ash Mountain, CA Water Quality
Is Nps-Ash Mountain's water safe to drink?
Nps-Ash Mountain's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. 2,930 people get their water from it, across 45 connections.
Ranked against every other system in this dataset
Nps-Ash Mountain has 4 violations on record in total, 0 of them health-based - ranking it 11,485th of 12,903 systems by violation count, the 11th percentile nationally.
How Nps-Ash Mountain compares within CA
CA's 804 covered systems average 5.8 health-based violations each; Nps-Ash Mountain carries 0, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for Nps-Ash Mountain is from 2025-02-07. Last reported to EPA: 06/22/2026.
What this data is and is not
Everything on this page is Nps-Ash Mountain's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 0 health-based violations on file for Nps-Ash Mountain - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.